Picture frame



FIG. 1 is a perspective view of a picture frame showing my new design;

FIG. 2 is a front view thereof;

FIG. 3 is a top view thereof, the bottom view being identical;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a perspective view of a second embodiment of my design; and,

FIG. 7 is a perspective view of a third embodiment of my design.

The broken lines shown in the FIGURES represent environmental subjectmatter and form no part of the claimed design.

The ornamental design for a picture frame, as shown and described.